# What is a hard real time system?

What is a hard real time system?

If the real-time systems have minimum interrupt latency and task deadline with prescribe time limits then it is known as hard real-time systems.  If these two requirements meet in real time systems but not always then it is known as soft real-time systems.

## Related questions

Description : What is the real time scheduling?

Answer : Hard real-time and soft real-time are the types of real time scheduling. Real time

Description : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response

Answer : What is the time response of a system whose poles lie on the right hand side of s-plane? A) Exponentially increasing B) Exponentially decreasing C) Sinusoidal oscillations D) Step response

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What is a time variant system?

Description : If the displayed system time and date is wrong, you can reset it using :  (A) Task bar (B) Menu bar (C) Desk top (D) Control panel

Answer : If the displayed system time and date is wrong, you can reset it using : Control panel

Description : With fault clearing time, the transient stability of a power system

Answer : With fault clearing time, the transient stability of a power system decreases

Description : Linear Time Invariant (LTI) System

Answer : Linear Time Invariant System Linear system means a system which possesses the property of superposition. Time invariant system means its behavior and characteristics are fixed over time. Before ... from the impulse response. Impulse response is related to frequency response via Fourier transform.

Description : Hard steel is suitable for making permanent magnets because?

Answer : Hard steel is suitable for making permanent magnets because it has good residual magnetism.

Description : Can a power surge erase a hard drive?

Description : The friction losses in Real Transformers are :  (A) 0% (B) 5% (C) 25% (D) 50%

Description :

(b)

Consider the circuit shown under the DC-steady-state condition.

(i)

Re-draw the circuit by replacing the capacitor and inductor with open and short-circuit.

(ii)

Determine the current, IL and the voltage, VC.

(iii)

Calculate the energy stored in the inductor and capacitor, respectively.

Description :

What is Time of Day tariff? How it help in energy conservation?

Answer : Time-off-day tariff:- In addition to basic tariff (Maximum Demand Tariff / KVA Maximum Demand Tariff / Load factor tariff /also the tariff in which P.F. of industrial consumer is taken ... the rated load for longer times of the day their overall efficiency gets higher helping to conserve energy.

Description : What is the Fourier transform of a Gaussian time pulse? A) Uniform B) Gaussian C) Impulses D) Pulse

Answer : What is the Fourier transform of a Gaussian time pulse? A) Uniform B) Gaussian C) Impulses D) Pulse

Description : Explain slotted time quick return mechanism with neat sketch.

Answer : The slotted lever quick return mechanism is illustrated in Figs. a and b The crank AB (of adjustable length R) rotates with a uniform angular speed. The crank pin B is in the shape of a die block ... Fig. (b)) and the return stroke is completed in less time which is proportional to angle β.

Description :

Answer : It is denoted as τ, tau and has the value of 1/RC. We

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Description : sketch time period measurement by CRO.

Answer : Horizontal sweep is turned ON and the display appealing on the screen is adjusted by varying different control knobs provided on the front panel of CRO, till the signal is suitably displayed ... Where m=Number of division in one complete cycle n=Setting of time base =Time/Division

Description :

Time constant for RC circuit formula

τ = RC

Where, τ = time constant

Answer : Time constant for RC circuit formula τ = RC Where, τ = time constant

Description : Define: 1) frequency, 2) cycle, 3) time period, 4) amplitude

Answer : 1) frequency: The total number of cycles completed in one second is called frequency. Its unit is cycles per second or Hertz (Hz). Its formula is f = 1/ T, where T is time period. ... is second per cycle. 4) amplitude: the maximum instantaneous value of sine wave is called as amplitude.

Description : The average time required to reach a storage location in the memory to read or retrieve the contents of memory is called as A) Turnaround time B) Latency time C) Access time D) Response time

Answer : The average time required to reach a storage location in the memory to read or retrieve the contents of memory is called as Access time

Description : The operating time of instantaneous relay is

Answer : The operating time of instantaneous relay is 0.1 sec

Description : The time base signal in Cathode Ray Oscilloscope (CRO) is  (1) A square wave signal (2) A sawtooth signal (3) A triangular wave signal (4) A sinusoidal signal

Description : In electric traction for a trapezoidal speed-time curve, the time period is (A) free running speed period = constant speed period (B) free running period = coasting period (C) free running period + coasting period = constant speed period (D) average speed period = scheduled speed period

Answer : In electric traction for a trapezoidal speed-time curve, the time period is free running period + coasting period = constant speed period

Description : The time period of third harmonic of power supply frequency, in milliseconds, is (A) 20 (B) 3.33 (C) 6.66 (D) 60

Answer : The time period of third harmonic of power supply frequency, in milliseconds, is 6.66

Description : The time constant of the servo-mechanism can be decreased by

Answer : The time constant of the servo-mechanism can be decreased by decreasing the inertia of the system

Description : ln HRC fuse the time between cut-off and final current zero is called

Answer : ln HRC fuse the time between cut-off and final current zero is called the arcing time

Description : The time constant of a series R-C circuit is given by?

Answer : The time constant of a series R-C circuit is given by RC.

Description :

Time constant of a capacitive circuit?

Answer : Time constant of a capacitive circuit increase with increase of capacitance and increase of resistance.

Description :

Time constant of a circuit is the time in seconds taken after the application of voltage to each?

Answer : Time constant of a circuit is the time in seconds taken after the application of voltage to each 63% of maximum value.

Description : The time constant of the capacitance circuit is defined as the time during which voltage?

Answer : The time constant of the capacitance circuit is defined as the time during which voltage rises to 63.2% of its final steady value.

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Time constant of an inductive circuit?

Answer : Time constant of an inductive circuit increases with increase of inductance and decrease of resistance.

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For a frequency of 200 Hz, the time period will be?

Answer : For a frequency of 200 Hz, the time period will be 0.005 s.

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Answer : Integrating instruments are those which measure the total quantity of electricity delivered in a particular time.

Description :

Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

Description :

Answer : The relay with inverse time characteristic will operate within 5 to 10 sec.

Description :

Answer : The time of closing the cycle, in modern circuit breakers is 0.003 sec.

Description : The transit time of the current carriers through the channel of a JFET decides it's?

Answer : The transit time of the current carriers through the channel of a JFET decides it's gate characteristics.

Description : At which time power factor of the induction motor is low?

Answer : The power factor of the inducction motor is low at the time of starting as compare to while the induction motor is running.

Description : Time Domain Reflectometry (TDR)

Answer : Time Domain Reflectometry (TDR) TDR is a application of pulse technique and it is a echo technique. In this technique we observe and analyses  the reflected ... determine the length of the transmission line. This is easy and inexpensive technique.

Description : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are ______ respectively.  (A) positive, negative and negative (B) positive, zero and negative (C) positive, positive and negative (D) positive, negative and zero

Answer : In quadrilateral speed-time curve of electric traction system, the accelerations during successive time periods are positive, negative and negative respectively.

Description : Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is (A) causal & linear (B) non-causal & linear (C) causal & non-linear (D) non-causal & non-linear

Answer : Consider a continuous-time system with input x(t) & output y(t) are related by y(t) = x (sin t). This system is non-causal & linear

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Answer : Some embedded systems have Real-Time Operating Systems (RTOS) and some of them not. Real-Time Operating Systems is a platform for building applications for embedded systems, Smaller Software ... they just have application code without RTOS. Every Real-Time Operating Systems have the kernel.

Answer : Advantages of Mechatronics system:  High level of integration.  Increased functionality and better design.  More use of electronics and software instead of mechanical function.  Assumes ... Its replacement is difficult, that it is difficult to change old system to new system.

Description : What are the disadvantages of Open loop control system?

Answer : Open loop control system are less reliable. In open loop control system Optimization is not possible. Open loop control system are less accurate.

Description : What is the choice of size and number of generator units in interconnected power system?

Answer : Choice of Size and Number of Generating Units: 1. The size/rating and number of generating units in such way that they approximately match with the load curve as closely as possible. 2. In ... , if power plant is connected to grid system then generating unit of higher capacity can be installed.

Description : What are the components of system bus? A) CPU Bus, Address Bus, Data Bus B) Memory, Control Unit, ALU C) Data Bus, Address Bus, Control Bus D) Register, PC, IR

Answer : What are the components of system bus? A) CPU Bus, Address Bus, Data Bus B) Memory, Control Unit, ALU C) Data Bus, Address Bus, Control Bus D) Register, PC, IR

Description : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Answer : The clock frequency of an 8085 microprocessor based system is 3 MHz. What should be the minimum pulse width of the INTR signal so that it is recognized successfully? A) 5.6 µs B) 5.7 µs C) 5.8 µs D) 5.9 µs

Description : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth

Answer : What will happen to the gain margin if the gain of the open loop system is doubled? A) Doubled B) Becomes half C) Is not affected D) Becomes one-fourth

Description : What is the traction system?

Description :

What is stable and unstable system?

Description : What is the impulse response of the system?

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